Stretcher roll



w, B. WOOD STRETCHER ROLL June 1929' Filed oc 1927 FIG I.

INV wtnzhr p B M0611 WITNESSES ponent l atented dune iii, ll

WINTER/O]? B. W001), F WILMINGTUNIDELAWARE ASSIGNOR T V 0 JOSEPH 31 111111550 SONS (10., 0F WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE JET &

c i filllitlETCHElt ROLL.

Application filed bctober 3, 192?. Serial No. 223,725.

This invention relates to stretcher rolls useful in the textile art, for example, in con nection with what are known as bloom calender s to spread or stretch cloth transversely so as to prevent subsequent creasing or scoring as it is passed between the heated.

pressure rollers of the calenders for surface finishing. Stretcher rolls of the character referred to are usually continuous and of rubber, and revolve on curved axes in contact with the cloth. As a consequence of surface slippage and variable torsion that takes place incidental to operation of the rolls in working the cloth outward from the center toward the selvage edges, wear occurs unevenly throughout the length of the rolls especially at the ends. Such uneven wear eventually results in injury to the cloth, and, for correction, entails frequent replacement of the stretcher rolls in their entirety.

The present invention aims to overcome the above difficulties through provision of a stretcher roll embodying a multiplicity of component sections capable of being easily interchanged so that uneven wear may be compensated for from time to time to, the end of considerably lengthening the lifeof the roll and correspondingly decreasing maintenance costs.

if further aim to provide a stretcher roll of the specified type which does not require lubrication so that the possibility of the cloth becoming soiled or stained through dripping or leakage of oil, is entirely obviated.

Other objects and attendant advantages will be manifest from the detailed description which follows when taken in connection with the drawings, whereof Fig. l is a diagrammatic view of a bloom calender equipped with a stretcher roll conveniently embodying my invention.

Fig. H is an end view of one of the cominterchangeable sections of the stretcher roll.

Fig. T11 is a part elevation and part axial. sectional view of the roll section shown in Fig. ill; and,

Fig. TV is an illustrationsimilar to 1T1 showing the construction of one of the end sections of the stretcher roll.

l/llith more detailed reference, first more particularly to Fig. l, the superposed pressure drums of the bloom calender therein illustrated are indicated by the numerals 10, 11, these being suitably heated interiorly tween the drums 10, 11, is stretched or spread laterally so as to be presented to said drums 1n a perfectly flat condition.

The function just referred to is accomphshed by the stretcher roll indicated at 13 'w1th which the present invention is more 6 especially concerned. This stretcher roll 13 embod es a rnultiplicity of component short length sections 1 1, for the details of which reference must be had to 15 igsll and HI.

As there shown, the component roll sections 14 comprise hollow eylindi'ic body portions 15 of metal, the opposite sides of which are formed with clutching projections 16 adapted to interlock after the manner illustrated in Fig. l. obliged to rotate in unison about a curved stationary axis 17 upon which they are mounted, under drive of the passing cloth G ashe'reinafter more fully explained. The

axis 17 may be secured to the side frames 12 8 of the bloomcalender in .any convenient way which will admit of ready detachment when interchange of the sections 14 becomes necessary. Fitted into openings 18 in opposite side faces of the hollow body portion 15 of each section. 14.- are replaceable bushings 19 of suitable non-metallic oil-less material, for example, prepared fiber, adapted to hear directly against the axis 11". it will be observed that the bushings 19 are comparatively narrow, and, by virtue of being separated by a liberal interval for hearing at spaced points only, the roll sections 1-1 are accorded capacity for free rotation on the axis 17 notwithstanding the curvature of the latter. cylindric body portions 15 of the roll sections 14: are covered on the exterior with yielding material 20, preferably soft rubber, which extends outward over the clutching projections 16. Accordingly, when the roll sections 14 are assembled on the axis 17, as in 1,

it will be seen that a continuous surface is provided for contact with the cloth C.

The sections 21 for the ends of the stretcher roller 13, one of which is detailed in Fig.

TV, are constructed along the same lines as the intermediate sections just described. except for the omission of clutch projections 16 at one side. in view of the similarity,

the same reference numerals, modified. by

The roll sections 1% are thus 75 The 95 the subscript a, are employed in Fig. IV to identify corresponding parts and to avoid the necessity for repetitive description.

In the operation of my improved spreader roll 13, it will be apparent that as a consequence of its curved configuration, that slippage takes place under drive of the cloth C, causing uneven wear at different points,

in its length, the greatest Wear occurring at or near the ends where contact is made with the cloth selvages. When wear has progressed to the extent of being likely to injure or mark the cloth C, I interchange the worn end sections '21 of the roll 13 Wlth-OthQIS in the central region. Should the covering 20 on any of the sectiogs libecome dried out or fractured after long periods of use, it can 0bviously be renewed at small expense. The same is also true with regard to replacement of the bushings 19.

From the foregoing it will be apparent that I have provided a sectional stretcher roll 13 which is extremely simple in construction, easily applied to the calenders, and which is moreover inexpensive from the standpoint of maintenance.

While I have herein shown and described -my invention in connection with a bloom calender, it will be apparent that it may be used, with like advantages, in connection with other textile machinery, or in other treatments of fabrics where smoothing its pre-requisite to prevent subsequentwrinkling or scoring.

Having thus described my invention, I claim:

1. A stretcher roll of the character described comprising component interchangeable sections with hollow metallic body poi-- tions and outer coverings of yielding material, said composite sections interlocking at their ends for rotation in unison on a fixed axis, and replaceable non-metallic oil-less bushings at opposite sides to hear at spaced intervals only on the axis.

2. A stretcher roll of the character described comprisingcomponent interchangeable sectionswith hollow metallic body portions and outer coverings of yielding material forming a continuous rolling surface, F

said composite sections interlocking at their ends for rotation in unison on a fixed curved axis, and replaceable comparatively-narrow non-metallic oil-less bushings at opposite sides to bear at spaced intervals only on the curved axis.

3. In a cloth stretcher roll of the character described, the combination of component interchangeable sections colnprising hollow cylindric body portions of metal and outer coverings of yielding material, said composite sections having clutching projections at the ends for interlocking rotation in uni-- son on a fixed axis, and the outer coverings forming a continuous surface to contact with the cloth.

4. In a cloth stretcher roll of the character described, the combination of component interchangeable sections with metallic body portions having clutch projections adapted to interlock at the ends for rotation of the sections in unison on a fixed axis, and outer cove-rings of yielding material extending over the clutch projections with provision of a continuous surface for contact with the cloth.

In testimony whereof, I have hereunto signed my name at Wilmington, Delaware, this 29th day of Sept, 1927.

IVINTHROP B. WOOD. 

